When the water in a plant’s vacuoles is used, it causes
a. a waxy covering to develop.
b. increased tissue growth.
c. transpiration.
d. wilting
D
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Which of the following is true of both T cells and B cells?
A. They produce effector cells against specific pathogens. B. They are produced from stem cells of the bone marrow. C. They can attack and destroy invading pathogens. D. They have a short life span. E. All of these statements are true.
This drug is normally injected but can also be processed into forms that can be smoked or inhaled. It is a synthetic opiate that produces feelings of ecstasy
A) marijuana B) caffeine C) alcohol D) heroin
While some animals, such as birds, reproduce sexually, others, such as sponges, produce asexually. Why is it beneficial for a species to reproduce sexually instead of asexually?
A) Sexual reproduction results in offspring that have twice as many chromosomes as the parents, while asexual reproduction produces offspring that have half the number of chromosomes as the parent. B) Sexual reproduction requires less time and energy than asexual reproduction. C) Sexual reproduction results in offspring that are genetically identical to the parents, while asexual reproduction results in offspring that are genetically different from the parent. D) Sexual reproduction results in offspring that are genetically different from the parents, while asexual reproduction results in offspring that are genetically identical to the parent.
In the carbon reactions, carbon dioxide molecules are reduced by the addition of electrons carried from the light reactions by __________.
A. ATP B. chlorophyll C. NADPH D. oxygen E. water